Improvement in rear sights for fire-arms



v C. F. ROBBINS.

REAR SIGHT FOR FIRE-ARMS.

No. 190,782. Patented May 15, 1877.

n Ammlsvs J N- PETERS. FHOTOLLITHOGRAPHER. WASHING'i'ON, D C

CHARLES F. ROBBINS, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN REAR SIGHTS FOR FIRE-ARMS.

Specification forming part of Letters Patent No. 190,782, dated May 15,1877; application filed April 23, 1877.

To all whom it may concern:

Be it known that I, OHABLEs F. ROBBINS, of Brooklyn, in the county ofKings and State of New York, have invented a new and Improved Rear-SightWind-Gage for Rifles, of which the following is a specification:

Figure 1 is a front elevation. Fig. 2 is a side elevation in section online 99 w in Fig. 1. Fig. 3 is a plan view of the sight-support with thescrew and slotted arm removed.

Similar letters of reference indicate corresponding parts.

The object of my invention is to provide a gage for adjusting the rearsights of rifles from a zero-point to the maximum of windage, at eitherright or left hand.

Referring to the drawing, A is a crossshaped piece having ears B, inwhich the micrometer-screw O is journaled. D is a T- shaped spring, thatis secured to the longer arm of the cross-shaped piece A by the screw a.The head of the T-shaped spring extends from one of the ears B, to theother, and is made convex in a transverse direction, and is providedwith a central longitudinal rib, b. The slotted bar E,in which the rearsight is placed, is provided with a head, E, which is bored and threadedto fit the screw 0. This head is inade concave on two sides, 0 d, and isprovided with grooves inthe concave sides, that fit the rib b on thespring D, and hold the slotted bar in either a vertical or horizontalposition. The head E is provided with a flange or projection, e, thatengages the edge of a scale, F, that is attached to the crossshapedpiece A by the screw f. The zero of the scale is in the center, and thegraduations run from the zero point toward each end. The screw 0 andscale F may be made of any desired length, so that the sight may beadjusted in either direction, as required.

The sights of the ordinary military rifles may be readily converted bysubstituting a micrometer-screw for the pivot that now holds the leaf inplace, and cutting away the ears and sides of the base of the leaf, soas to permit the required lateral motion, and attaching a graduatedscale to the front of the sightbase.

The advantages gained by my improvement are, that the wind-gage may beadjusted from the butt of the rifle while the shooter is in position forshooting. It obviates the danger and inconvenience of adjusting the windgage from the muzzle of the rifle.

. Having thus described my invention, I claim as new and desire tosecure by Letters Patent The cross-shaped piece A, having ears B, thespring D, micrometer-screw 0, scale F, and slotted bar E, incombination, substantially as shown and described- CHARLES F. ROBBINS.

Witnesses:

G. SEDGWIGK, ALEX. F. ROBERTS.

